Insulating compound



i a i I f.

UNITED STATES PATENT OFFICE.

JAMES L. MARMAUD, OF MALDEN, MASSACHUSETTS.

INSULATING COMPOUND.

SPECIFICATION forming part of Letters .Patent No. 458,551, dated August 25, 1891. Application filed May 19, 1891. Serial No. 393,834. (No specimens.)

To all whom it may concern: fifth part of fir-balsam. A sufficient quantity Be it known that I, JAMES L. MARMAUD, a of benzine is added to bring the citizen of the United States of America, recompound to the proper consistency.

siding at Malden,in the county of Middlesex While I have stated specific proportions, I 5 and State of Massachusetts, have invented do not limit myself absolutely in this respect, 3o certain new and useful Improvements in Inas they may be varied to some extent withsulating Composition,of which the following out changing materially the character of the is a specification. composition. Thecompound is then applied 'r- The objection of my invention is to proto the wire, twine, cord, asbestus twine, silk,

l0 vide an insulating-covering for wires of all or other material to be coated by dipping, or 35 description requiring such protection; and to in any suitable manner. this end the invention consists of a composi- I claim as my invention 7 tion of matter which is adapted to be applied The hereinbefore-described composition of as a coating to insulate the wire. matter for insulating purposes, consisting of i i 5 In compounding my mixture I take, by calcined lixiviated infusorial earth, talc or 40 weight, one part of in n xi 'i- 0 soa stone, LIM ELfl 9E, sulphur, MW

rosin, 'l

fusorial earth a thir one par 0 gl mgtte gj soda, rubber, bisulphide of m stone one thirty-seeon par carbon, fir-balsam, and benziue or naphtha,in ii I I l; E n1 substantially the proportions specified. it, 20 arge one-six een a par 0 In testimony whereof Iafiix mysignat-nrein 5 an onesixty-fourth partof s1 mate 0 so am presence of two witnesses.

solution. To this I add tmof JAMES L. MARMAUD.

ure rubber dissolved in benzine or na htha Vitnesses: o t e consls ency 0 1e w 1 e 0 an egg, NEAL MCCOLGAN, 25 one-fifth part of bisulphide of earbon and one- FRANK M. DAVIS. 

